While we can't say much about his character, but we can say this: Callis will play, a highly anticipated and pivotal new character to the 12 Monkeys' mythology. Callis' character is described as a, "rebellious and enigmatic time-traveler raised throughout history by the Army of the 12 Monkeys, one whose conflicted personal and emotional path will change everything for James Cole (Aaron Stanford) and Dr. Cassandra Railly (Amanda Schull).